THERMAL SCIENCE

International Scientific Journal

Sathyakala Ponnusamy

,

Sai Sundara Krishnan Gangadharan

,

Balaji Kalaiarasu

AN EXERGY ANALYSIS FOR OVERALL HIDDEN LOSSES OF ENERGY IN SOLAR WATER HEATER

ABSTRACT
This study investigates the hidden thermal losses of glass plate, collector plate, water pipe and storage tank of solar water heater in the process of energy conversion. The present non-conventional energy methods are insufficient, whereas the exergy analysis provides a remarkable solution. Thus, employing the exergy analysis, entropy generation, exergy destruction, and exergy efficiency of each subsystem of solar water heater are computed. The obtained results showed that the entropy generation and exergy destruction are high during the heat transfer in each subsystem. Henceforth, the existing solar water heater design is modified placing hexagonal honeycomb structure between the glass plate and the collector plate and also water pipe is insulated to trap huge amount of solar energy. The proposed design exhibits improved exergy efficiency when compared with the existing model, which enhances the performance of the system.
KEYWORDS
solar water heater, energy balance, exergy destruction, exergy efficiency
PAPER SUBMITTED: 2020-05-30
PAPER REVISED: 2020-10-28
PAPER ACCEPTED: 2020-11-12
PUBLISHED ONLINE: 2021-01-02
DOI REFERENCE: https://doi.org/10.2298/TSCI200530343P
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2022, VOLUME 26, ISSUE Issue 1, PAGES [49 - 61]
REFERENCES
  1. Suzuki, A., A Fundamental Equation for Exergy Balance on Solar Collectors, J. Sol. Energy Eng., 110 (1988), 2, pp. 102-106
  2. Gupta, D. K. K., Saha, S. K., Energy Analysis of Solar Thermal Collectors, J. Renew. Energy & Environ., (1990), pp. 283-287
  3. Luminosu, I., Fara, L., Determination of the Optimal Operation Mode of a Flat Solar Collector by Exergetic Analysis and Numerical Simulation, Energy., 30 (2005), 5, pp. 731-747
  4. Farahat, S., Sarhaddi, F., Ajam, H., Exergetic Optimization of Flat Plate Solar Collectors, Renew. Energy., 34 (2009), 4, pp. 1169-1174
  5. Jafarkazemi, F., Ahmadifard, E., Abdi, H., Energy and Exergy Efficiency of Heat Pipe Evacuated Tube Solar Collectors, Therm. Sci., 20 (2016), 1, pp. 327-335
  6. Zhong, G., Huitao, W., Hua, W., Songyuan, Z., Xin, G., Exergy Analysis of Flat Plate Solar Collectors. Entropy., 16 (2014), 5, pp. 2549-2567
  7. Sivaraman, G., Mohan, R., Harikrishnan, V., Experimental Investigation on Effect of Modified Solar Collector in Solar Water Heating System, Therm. Sci., 24 (2020), 1, pp. 481-485
  8. Malvi, C. S., Gupta, A., Gaur, M.K., Crook, R., Dixon, H. D. W., Experimental Investigation of Heat Removal Factor in Solar Flat Plate Collector for Various Flow Configurations, Int. J. Green Energy., 14 (2017), 4, pp. 442-448
  9. Orlando, M. M., José, J. F. P., Heat Removal Factor in Flat Plate Solar Collectors: Indoor Test Method, Energies., 11 (2018), 10, pp. 2783
  10. Hollands, K. G. T., Honeycomb Devices in Flat Plate Solar Collectors, Solar Energy Society Conference, Phoenix Arizona, 1965, Vol. 9, pp.159 -164
  11. Mozumder, A Anjani K. S., and Sharma, P., Study of Cylindrical Honeycomb Solar Collector, J. Sol. Energy, 2014 (2014), pp. 7
  12. Abdullah, A, H., Abou-Ziyan, H. Z., Ghoneim, A. A., Thermal Performance of Flat Plate Solar Collector using Various Arrangements of Compound Honeycomb, Energy Convers. Manag., 44 (2003), 19, pp. 3093-3112
  13. Dincer, I., Cengel, Y. A., Energy, Entropy and Exergy Concepts and Their Roles in Thermal Engineering, Entropy, 3 (2001), 3, pp. 116-149
  14. Hottel, H. C., Keller, J. D., Effect of Reradiation on Heat Transmission in Furnaces and Through Openings, Trans. A.S.M.E., 55 (1933), 55-56, pp. 39-49
  15. Sukhatme, S. P., Solar Energy, McGraw-Hill., New York, USA, 2014
  16. Najian, M. R., Exergy Analysis of Flat Plate Solar Collector, M. S. Thesis, Tehran University, Tehran, Iran, 2000
PDF VERSION [DOWNLOAD]
An exergy analysis for overall hidden losses of energy in solar water heater

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence